# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1588099504 -7200
# Node ID 304015471ae968e3823c030c1a5e6bacdb540f2e
# Parent  84fc9bacfd32f6fa81a90af2dc41cdf250051b6d
patch 8.2.0656: MS-Windows: redrawing right screen edge may not be needed

Commit: https://github.com/vim/vim/commit/7ed8f59ae09278c666f1b43488351f9450097372
Author: Bram Moolenaar <Bram@vim.org>
Date:   Tue Apr 28 20:44:42 2020 +0200

    patch 8.2.0656: MS-Windows: redrawing right screen edge may not be needed

    Problem:    MS-Windows: redrawing right screen edge may not be needed.
    Solution:   Check the build version. (Nobuhiro Takasaki, closes https://github.com/vim/vim/issues/6002)

diff --git a/src/drawscreen.c b/src/drawscreen.c
--- a/src/drawscreen.c
+++ b/src/drawscreen.c
@@ -2439,7 +2439,8 @@ win_update(win_T *wp)
 
 #ifdef FEAT_VTP
     // Rewrite the character at the end of the screen line.
-    if (use_vtp())
+    // See the version that was fixed.
+    if (use_vtp() && get_conpty_fix_type() < 1)
     {
 	int i;
 
diff --git a/src/os_win32.c b/src/os_win32.c
--- a/src/os_win32.c
+++ b/src/os_win32.c
@@ -188,6 +188,7 @@ static int win32_set_archive(char_u *nam
 static int conpty_working = 0;
 static int conpty_type = 0;
 static int conpty_stable = 0;
+static int conpty_fix_type = 0;
 static void vtp_flag_init();
 
 #if !defined(FEAT_GUI_MSWIN) || defined(VIMDLL)
@@ -7289,6 +7290,12 @@ mch_setenv(char *var, char *value, int x
 #define CONPTY_1909_BUILD	    MAKE_VER(10, 0, 18363)
 
 /*
+ * Stay ahead of the next update, and when it's done, fix this.
+ * version ? (2020 update, temporarily use the build number of insider preview)
+ */
+#define CONPTY_NEXT_UPDATE_BUILD    MAKE_VER(10, 0, 19587)
+
+/*
  * Confirm until this version.  Also the logic changes.
  * insider preview.
  */
@@ -7334,6 +7341,9 @@ vtp_flag_init(void)
 	conpty_type = 2;
     if (ver < CONPTY_FIRST_SUPPORT_BUILD)
 	conpty_type = 1;
+
+    if (ver >= CONPTY_NEXT_UPDATE_BUILD)
+	conpty_fix_type = 1;
 }
 
 #if !defined(FEAT_GUI_MSWIN) || defined(VIMDLL) || defined(PROTO)
@@ -7622,6 +7632,12 @@ is_conpty_stable(void)
     return conpty_stable;
 }
 
+    int
+get_conpty_fix_type(void)
+{
+    return conpty_fix_type;
+}
+
 #if !defined(FEAT_GUI_MSWIN) || defined(VIMDLL) || defined(PROTO)
     void
 resize_console_buf(void)
diff --git a/src/proto/os_win32.pro b/src/proto/os_win32.pro
--- a/src/proto/os_win32.pro
+++ b/src/proto/os_win32.pro
@@ -79,5 +79,6 @@ int has_vtp_working(void);
 int has_conpty_working(void);
 int get_conpty_type(void);
 int is_conpty_stable(void);
+int get_conpty_fix_type(void);
 void resize_console_buf(void);
 /* vim: set ft=c : */
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    656,
+/**/
     655,
 /**/
     654,